Synthesis,Structure and Properties of a New Molybdate-tellurite Compound with 2D Triangular Lattice

• 作者: XIE Ya-Xin ZHANG Wan-Wan ZHAO Zhi-Ying HE Zhang-Zhen
• 来源期刊: 结构化学
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: coordination cbemistry
• 页码范围: 96-102
• 页数: 7页
• 语种: 英文
• DOI: 10.14102/j.cnki.0254-5861.2011-2778

摘要

A new 3d transition-metal molybdate-tellurite(NH4)2Co(TeMo2O9)2 was obtained through a conventional hydrothermal method.This compound was confirmed to crystallize in the monoclinic system of space group P21/c with a = 10.5133(5),b = 10.6456(5),c = 7.6078(5)?,β= 108.879(6)°,V= 805.66(8)?3,Z = 2,Mr=1021.97,Dc = 4.213 g/cm3,μ = 7.685 mm-1,F(000)= 930,the final R = 0.0399 and wR = 0.1025 for 1580 observed reflections with Ⅰ ＞ 2σ(Ⅰ),showing a tunnel structure with spin triangle-lattice composed by CoO6 octahedra.Magnetic and heat capacity measurements confirmed a paramagnetic behavior down to 2 K with a negative Weiss temperature of-20 K,suggesting remarkable spin frustration in the system.